Teeworlds!

Soldat is an exciting unique side-view multiplayer action game. Played by hundreds of players at this moment. It takes the best from games like Liero, Worms, Quake and Counter-Strike and gives you fast action gameplay with tons of blood and flesh. Little ragdoll soldiers fight against each other on 2D battle arenas using a deadly military arsenal. This is what multiplayer was invented for.

Use dynamite, grenades, baseball bat and bazookas to exterminate your opponent in a 2D environment with toon-style scenery.

OpenLieroX - extremely addictive realtime worms shoot-em-up backed by an active gamers community. Play the most famous Liero clone! Windows, Linux and Mac OS X version available.

Battle other 2D stickman online while jumping around like a lunatic and getting blown up into smithereens. With 70 weapons, Boring Man is the most chaotic and hilarious 2D online shooter on the internet. Customize game modes with highly flexible options and crazy mutators!

Abuse is a dark 2D side-scrolling platform game developed by Crack dot Com in 1995. It features beautiful lighting, realistic animation and nasty alien-like creatures to destroy.

Armajet is an accessible, free-to-play multiplayer shooter designed for mobile that pits teams of players against each other in fast-paced jetpack combat. Players compete in a modern arena shooter that’s easy to learn and hard to master.

Kill Fun Yeah is an online 2D platform shooter. Besides killing your enemies it also involves shooting up and reconstructing your enviroment. You can try out the game for free and if you like it you can upgrade your account to get access to all new content that is being added for a reduced price during the Alpha phase.